Let the jerks of the world serve as the perfect example of what you don't want to be. You'll be a heck of a lot happier, and in the long run, there's a chance that other person at work will end up asking what your secret is. Why are you the happy one? In other words, don't let your thoughts think you. Besides, if you're really gonna get pissed, don't waste it on your family, friends, or coworkers, save it for something that really matters.